CN114285053B - Energy storage charging station - Google Patents

Energy storage charging station Download PDF

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Publication number
CN114285053B
CN114285053B CN202111330842.XA CN202111330842A CN114285053B CN 114285053 B CN114285053 B CN 114285053B CN 202111330842 A CN202111330842 A CN 202111330842A CN 114285053 B CN114285053 B CN 114285053B
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CN
China
Prior art keywords
cooling medium
heat exchanger
energy storage
liquid heat
valve
Prior art date
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Active
Application number
CN202111330842.XA
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Chinese (zh)
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CN114285053A (en
Inventor
胡明贵
廉志晟
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Huawei Digital Power Technologies Co Ltd
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Huawei Digital Power Technologies Co Ltd
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Application filed by Huawei Digital Power Technologies Co Ltd filed Critical Huawei Digital Power Technologies Co Ltd
Priority to CN202111330842.XA priority Critical patent/CN114285053B/en
Publication of CN114285053A publication Critical patent/CN114285053A/en
Priority to PCT/CN2022/103798 priority patent/WO2023082669A1/en
Application granted granted Critical
Publication of CN114285053B publication Critical patent/CN114285053B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The embodiment of the application provides an energy storage charging station, which can realize the heat exchange between an energy storage system and a charging system by intensively managing the heat of the energy storage system and the charging system, wherein a cooling medium in a cooling medium loop flows through the charging system and the energy storage system respectively, the charging system and the energy storage system are in heat exchange with the cooling medium loop, and the heat generated by the charging system during operation is transmitted to the energy storage system through the cooling medium loop for use, so that the energy consumption required by the maintenance of the temperature of energy storage heating is reduced, and the energy utilization efficiency is improved.

Description

Energy storage charging station
Technical Field
The application relates to the technical field of thermal management, in particular to an energy storage charging station.
Background
The energy storage charging station can be used for charging external equipment such as automobiles, and the energy storage charging station generally comprises an energy storage system and a charging system, and the energy storage charging station is connected with a power grid, and the charging system can directly charge the external equipment by the power grid in a trough period with loose electricity consumption, and can charge the external equipment through the energy storage system in a peak period with tension electricity consumption.
In the related art, the energy storage charging station needs to be thermally managed by the thermal management system for the energy storage system and the charging system, and the thermal management can be divided into two parts, namely, one part is required to be cooled if the heating value is too high during the operation of the charging system, and the other part is required to be maintained in a proper working range, the battery of the energy storage system needs to be cooled during the high temperature, and the battery needs to be heated during the low temperature. But the heat generated during the operation of the charging system can be dissipated to the surrounding environment, and the energy consumption of the heating maintenance temperature of the energy storage system is also larger, so that the overall energy consumption of the energy storage charging station is larger, and the energy utilization rate is lower.
Disclosure of Invention
The embodiment of the application provides an energy storage charging station, which can solve the problems that the working heat of a charging system cannot be utilized, the energy consumption of the temperature maintenance of the energy storage system is large, and the whole energy utilization rate of the energy storage charging station is low.
The embodiment of the application provides an energy storage charging station, which comprises a heat exchange assembly, an energy storage system for storing electric energy and a charging system for charging an electric device, wherein the energy storage system and the charging system are electrically connected, the heat exchange assembly comprises a cooling medium loop, cooling medium in the cooling medium loop respectively flows through the charging system and the energy storage system, and heat exchange is carried out between the charging system and the energy storage system and the cooling medium loop, so that heat generated when the charging system works is transferred to the energy storage system through the cooling medium loop.
The energy storage charging station provided by the embodiment of the application can be used for intensively managing the heat of the energy storage system and the charging system, and can be used for conveying the heat generated by the charging system when the charging system works to the energy storage system for use when the energy storage system needs to be heated in a low-temperature environment, so that the energy consumption required by the energy storage heating to maintain the temperature is reduced, and the energy utilization efficiency is improved.
In one possible embodiment, the heat exchange assembly may comprise at least two cooling medium circuits, which may comprise a first cooling medium circuit configured to exchange heat with the energy storage system and a second cooling medium circuit configured to cool the charging system, the first cooling medium circuit and the second cooling medium circuit being communicable or may have heat exchange therebetween such that the cooling medium in the second cooling medium circuit exchanges heat with the energy storage system.
The second cooling medium loop can absorb heat generated by the charging system when the charging system works and transfer the heat to the second cooling medium loop in a direct or indirect mode, and the second cooling medium loop can provide heat for the temperature maintenance of the energy storage system, so that the effective heat transfer of the charging system and the energy storage system under partial working conditions is realized.
In one possible embodiment, the heat exchange assembly may further include a charger heat exchanger in communication with the second cooling medium circuit and configured to exchange heat with the charging system.
The cooling medium in the second cooling medium loop can be subjected to efficient heat exchange with the charging system through the charging piece heat exchanger, so that heat dissipation loss during the operation of the charging system is reduced.
In one possible embodiment, the heat exchange assembly further comprises at least one liquid heat exchanger for heat exchange between different cooling medium circuits, the liquid heat exchanger having a first liquid heat exchange channel and a second liquid heat exchange channel, and the first liquid heat exchange channel and the second liquid heat exchange channel of the same liquid heat exchanger having heat exchange therebetween.
Through setting up liquid heat exchanger, can be with the heat transfer in the higher cooling medium return circuit of temperature for the lower cooling medium return circuit of temperature, under the circumstances that different cooling medium return circuits do not directly communicate, realize efficient heat exchange, avoid cooling medium to produce the heat loss in the circulation in-process.
In one possible embodiment, the liquid heat exchanger may comprise a first liquid heat exchanger, the second cooling medium circuit being connected to a first liquid heat exchange channel in the first liquid heat exchanger, the second liquid heat exchange channel of the first liquid heat exchanger being in communication with or in heat exchange with the first cooling medium circuit.
By using the first liquid heat exchanger, the heat of the second cooling medium circuit may be transferred to the first cooling medium circuit, or the heat of the first cooling medium circuit may be transferred to the second cooling medium circuit.
In one possible embodiment, the heat exchange assembly may further comprise a first energy storage heat exchanger in communication with the first cooling medium circuit and configured to exchange heat with the energy storage system through a phase change of the cooling medium.
The arrangement is that the cooling medium in the first cooling medium loop generates phase change when flowing through the first energy storage heat exchanger, absorbs or releases heat in the process, so that the heating or cooling of the energy storage system is realized, and the heat exchange efficiency is improved.
In one possible embodiment, the first cooling medium circuit may further include a first heat pump assembly, a first air heat exchanger, and a first throttle valve, where the first heat pump assembly, the first air heat exchanger, the first throttle valve, and the first energy storage heat exchanger are sequentially connected; the first end of the first liquid heat exchanger is connected with the first air heat exchanger, and the second end of the first liquid heat exchanger is connected between the first heat pump assembly and the first energy storage heat exchanger; the heat exchange assembly may further include a first valve assembly configured to control a communication state of the first liquid heat exchanger in the first cooling medium circuit; the first heat pump assembly comprises a first compressor and a first reversing valve which are sequentially connected, the first compressor and the first reversing valve are both connected in a first cooling medium loop, the first compressor is used for driving cooling medium in the first cooling medium loop to flow, and the first reversing valve is used for changing the flow direction of the cooling medium in the first cooling medium loop.
By the arrangement, the first cooling medium loop can form a complete cooling medium circulation path, and the phase change of the cooling medium can be independently utilized to realize cooling or heating of the energy storage system under the condition that the first cooling medium loop and other cooling medium loops do not have heat exchange.
In one possible embodiment, the first valve assembly may include a first communication valve and a second communication valve, the first cooling medium circuit further includes a first intermediate communication line, the first communication valve is connected between the first air heat exchanger and the first throttle valve, the first end of the first liquid heat exchanger is connected between the first communication valve and the first air heat exchanger, the second end of the first liquid heat exchanger is connected between the first communication valve and the first throttle valve through the first intermediate communication line, and the second communication valve is connected to the first intermediate communication line.
The circulation loop of the first cooling medium can be changed through the opening and closing changes of different communication valves in the first valve assembly, so that the cooling medium in the circulation loop flows through the first liquid heat exchanger, heat exchange is carried out between the circulation loop and the cooling medium in the second cooling medium loop, and then when the charging system works in a low-temperature state, heat of the charging system is transferred to the energy storage system.
In one possible embodiment, the first valve assembly may further comprise a third communication valve and a fourth communication valve, the second end of the first liquid heat exchanger being connected between the first heat pump assembly and the first energy storage heat exchanger through the third communication valve; the first cooling medium loop also comprises a second throttle valve, and the fourth communication valve and the second throttle valve are connected between the first air heat exchanger and the first end of the first liquid heat exchanger in parallel.
Through further setting up third communication valve and fourth communication valve, can change the circulation loop of first coolant, make first energy storage heat exchanger and first liquid heat exchanger form two relatively independent branch road to when ambient temperature is higher, can realize cooling down one of energy storage system and charging system, perhaps cool down both simultaneously.
In one possible embodiment, the cooling medium circuit may further include a third cooling medium circuit, the liquid heat exchanger may further include a second liquid heat exchanger, the first liquid heat exchange channel of the second liquid heat exchanger is connected to the first cooling medium circuit, the second liquid heat exchange channel of the second liquid heat exchanger is connected to the third cooling medium circuit in an on-off manner, and the second liquid heat exchange channel of the first liquid heat exchanger is connected to the third cooling medium circuit in an on-off manner; when the second liquid heat exchange channel of the second liquid heat exchanger and the second liquid heat exchange channel of the first liquid heat exchanger are in a communication state, the third cooling medium loop exchanges heat between the first cooling medium loop and the second cooling medium loop.
By providing the third coolant circuit, indirect heat exchange between the first coolant circuit and the second coolant circuit can be achieved by the coolant circuit being independent of the coolant circuit other than the first coolant circuit and the second coolant circuit, while the third coolant circuit can also perform separate heat exchange between the first coolant circuit and the second coolant circuit, respectively, in different operating states.
In one possible embodiment, the third cooling medium circuit may include a second heat pump assembly, a second air heat exchanger, a third throttle valve, and a fourth throttle valve, where the second heat pump assembly, the second air heat exchanger, and the liquid heat exchanger are sequentially connected; the third throttle valve is connected between the first end of the first liquid heat exchanger and the second air heat exchanger, the second end of the first liquid heat exchanger is connected with the heat pump assembly, the fourth throttle valve is connected between the first end of the second liquid heat exchanger and the second air heat exchanger, and the second end of the second liquid heat exchanger is connected with the second heat pump assembly; the second heat pump assembly comprises a second compressor and a second reversing valve which are sequentially connected, the second compressor and the second reversing valve are both connected in the third cooling medium loop, the second compressor is used for driving the cooling medium in the third cooling medium loop to flow, and the second reversing valve is used for changing the flow direction of the cooling medium in the third cooling medium loop.
By means of the arrangement, different effects of the liquid heat exchanger in the third cooling medium loop can be achieved through changing the flow direction of the cooling medium in the third cooling medium loop, and the cooling device can be used as a condenser for heating and an evaporator for absorbing heat to achieve cooling.
In one possible embodiment, the heat exchange assembly further comprises a second valve assembly configured to control the communication state of the first and second liquid heat exchangers with the third cooling medium circuit, respectively; the second valve assembly comprises a fifth communication valve and a sixth communication valve; the third cooling medium loop further comprises a second intermediate communication pipeline, the fifth communication valve is connected between the fourth throttle valve and the second air heat exchanger, the first end of the first liquid heat exchanger is connected with the third throttle valve, the second end of the first liquid heat exchanger is connected between the fifth communication valve and the fourth throttle valve through the second intermediate communication pipeline, and the sixth communication valve is connected on the second intermediate communication pipeline.
By arranging the second valve assembly, the circulation path of the cooling medium in the third cooling medium loop can be changed, so that the third cooling medium loop can absorb the heat of the second cooling medium loop, and the first cooling medium loop is heated when the heat exchange is carried out with the first cooling medium loop by utilizing the heat, so that the energy utilization rate is improved.
In one possible embodiment, the second valve assembly further comprises a seventh communication valve and an eighth communication valve, the seventh communication valve being connected between the second end of the first liquid heat exchanger and the second heat pump assembly, the eighth communication valve having two ends connected in parallel to the two ends of the third throttle valve, respectively.
Through further setting up seventh communication valve and eighth communication valve, can change the circulation route of cooling medium in the third cooling medium circuit, when charging system's operating temperature is higher to make the cooling medium in it flow through first liquid heat exchanger, can absorb the heat in the first refrigerant circuit, realize cooling down to charging system.
In one possible embodiment, the first cooling medium circuit includes a second energy storage heat exchanger and a third air heat exchanger, the second energy storage heat exchanger, the third air heat exchanger and the first liquid heat exchange channel of the second liquid heat exchanger are connected in sequence, and the second energy storage heat exchanger is configured to exchange heat with the energy storage system; the first cooling medium loop also comprises a first control valve, the first control valve is connected between the third air heat exchanger and the second liquid heat exchanger, a first interface and a second interface of the first control valve are respectively connected with the first ends of the third air heat exchanger and the second liquid heat exchanger, and a third interface of the first control valve is connected between the second end of the second liquid heat exchanger and the second energy storage heat exchanger.
When the working temperature of the energy storage system is high and heat dissipation is needed, the first cooling medium loop can be provided with two heat dissipation modes of air-liquid heat exchange and liquid-liquid heat exchange, and the first control valve can be used for selecting a cooling medium circulation loop which is not used, so that different heat dissipation modes or combination of heat dissipation modes are selected in different temperature states, and the energy consumption is reduced while the sufficient heat dissipation efficiency is ensured.
In one possible embodiment, the second cooling medium circuit further comprises a fourth air heat exchanger and a second control valve, the second control valve is connected between the charging member heat exchanger and the first liquid heat exchanger, and a first interface and a second interface of the second control valve are respectively connected with one ends of the charging member heat exchanger and the first liquid heat exchanger; the first end of the fourth air heat exchanger is connected with the third interface of the second control valve, and the second end of the fourth air heat exchanger is connected with the other end of the first liquid heat exchanger.
By the arrangement, the second cooling medium loop can radiate heat of the cooling medium in the second cooling medium loop by utilizing the fourth air heat exchanger when heat of the charging system is transferred to the first cooling medium loop, so that the charging system is assisted to cool.
In one possible embodiment, the second cooling medium circuit further comprises a third control valve, the first and second ports of which are connected to the fourth air heat exchanger and the charging element heat exchanger, respectively, and the third port of which is connected between the second control valve and the first liquid heat exchanger.
When the working temperature of the charging system is high and heat dissipation is needed, the second cooling medium loop can be provided with two heat dissipation modes of air-liquid heat exchange and liquid-liquid heat exchange, and the second control valve and the third control valve can be used for selecting a cooling medium circulation loop which is not used, so that different heat dissipation modes or combination of heat dissipation modes are selected under different temperature states, and the energy consumption is reduced while the sufficient heat dissipation efficiency is ensured.
In one possible embodiment, the heat exchange assembly further comprises a third valve assembly disposed in the cooling medium circuit, the third valve assembly configured to control the first cooling medium circuit and the second cooling medium circuit to be disconnected from or in communication with each other; when the first cooling medium loop and the second cooling medium loop are communicated with each other, the cooling medium in the second cooling medium loop directly flows through the first cooling medium loop to exchange heat with the energy storage system.
Through setting up the third valve subassembly, can make first cooling medium return circuit and second cooling medium return circuit relatively independent, perhaps make both form an holistic cooling medium circulation loop, in the thermal management process, according to ambient temperature or the state of generating heat, can realize independent temperature control of energy storage system and charging system, perhaps form heat exchange between the two to reduce the energy consumption, improve energy utilization.
In one possible embodiment, the cooling medium circuit may further comprise a fourth cooling medium circuit, the at least one liquid heat exchanger comprises a third liquid heat exchanger and a fourth liquid heat exchanger, the first liquid heat exchange channel of the third liquid heat exchanger being connected in the first cooling medium circuit, the first liquid heat exchange channel of the fourth liquid heat exchanger being connected in the second cooling medium circuit, the second liquid heat exchange channel of the third liquid heat exchanger and the second liquid heat exchange channel of the fourth liquid heat exchanger being connected in parallel in the fourth cooling medium circuit; the third liquid heat exchanger is used for exchanging heat between the fourth cooling medium loop and the first cooling medium loop, and the fourth liquid heat exchanger is used for exchanging heat between the fourth cooling medium loop and the second cooling medium loop.
By arranging the fourth cooling medium loop, independent heat management and temperature control of the first refrigerant loop and the second refrigerant loop can be realized, so that the requirements of different working modes under different environment temperatures are met, and the energy storage system and the charging system can be ensured to have proper working temperatures.
In one possible embodiment, the first cooling medium circuit includes a third energy storage heat exchanger and a fifth air heat exchanger, the third energy storage heat exchanger is configured to exchange heat with the energy storage system, and the third energy storage heat exchanger, the fifth air heat exchanger and the first liquid heat exchange channel of the third liquid heat exchanger are sequentially connected; the third valve assembly comprises a fourth control valve, the fourth control valve is connected between the fifth air heat exchanger and the first liquid heat exchange channel of the third liquid heat exchanger, a first interface of the fourth control valve is connected with the fifth air heat exchanger, and a second interface and a third interface of the fourth control valve are respectively connected to two opposite ends of the first liquid heat exchange channel in the third liquid heat exchanger.
So set up, first cooling medium return circuit can have two kinds of heat dissipation modes of empty liquid heat exchange and liquid heat exchange, utilize the fourth control valve can select the cooling medium circulation return circuit that does not use to under different temperature conditions, select different heat dissipation modes or the combination of heat dissipation modes, reduce the energy consumption when guaranteeing sufficient radiating efficiency.
In a possible embodiment, the heat exchange assembly further comprises an electric heating unit arranged in the first cooling medium circuit for heating the cooling medium in the first cooling medium circuit, the electric heating unit being connected between the fifth air heat exchanger and the third energy storage heat exchanger.
By arranging the heating unit, the first cooling medium loop can be independently heated, and the temperature of the energy storage system can be efficiently improved by using the heating unit when the charging system does not work or the working heat of the charging system is insufficient to raise the working temperature of the energy storage system to a reasonable threshold range.
In one possible embodiment, the third valve assembly further comprises a fifth control valve and a sixth control valve, the first and second ports of the fifth control valve being connected in the second cooling medium circuit, the third port of the fifth control valve being in communication with the first cooling medium circuit; the first interface and the second interface of the sixth control valve are connected in the first cooling medium loop, and the third interface of the sixth control valve is communicated with the second cooling medium loop.
Through setting up fifth control valve and sixth control valve, can realize that first cooling medium return circuit and second cooling medium return circuit carry out accurate high-efficient switching between the connection and disconnection state to realize different operating modes under the different ambient temperature.
In one possible embodiment, the second cooling medium circuit further includes a sixth air heat exchanger, the third valve assembly further includes a seventh control valve, the first port of the seventh control valve and the first port of the sixth control valve are respectively connected to opposite ends of the sixth air heat exchanger, the third port of the seventh control valve and the third port of the sixth control valve are respectively connected to opposite ends of the first liquid heat exchange channel of the fourth liquid heat exchanger, and the second port of the seventh control valve and the second port of the sixth control valve are respectively connected to opposite ends of the charging member heat exchanger.
When the working temperature of the charging system is high and heat dissipation is needed, the second cooling medium loop can be provided with two heat dissipation modes of air-liquid heat exchange and liquid-liquid heat exchange, and the sixth control valve and the seventh control valve can be used for selecting a cooling medium circulation loop which is not used, so that different heat dissipation modes or combination of heat dissipation modes are selected under different temperature states, and the energy consumption is reduced while the sufficient heat dissipation efficiency is ensured.
In one possible embodiment, the fourth cooling medium circuit includes a third compressor, a seventh air heat exchanger, a fifth throttle valve, and a sixth throttle valve, where an outlet of the third compressor is sequentially connected to an inlet of the seventh air heat exchanger, the third liquid heat exchanger and the fourth liquid heat exchanger are connected in parallel between the inlet of the third compressor and an outlet of the seventh air heat exchanger, the fifth throttle valve is connected between the third liquid heat exchanger and an outlet of the seventh air heat exchanger, and the sixth throttle valve is connected between the fourth liquid heat exchanger and an outlet of the seventh air heat exchanger.
By this arrangement, the third liquid heat exchanger and the fourth liquid heat exchanger can be formed in parallel in the fourth cooling medium circuit, and the first cooling medium circuit and the second cooling medium circuit corresponding to the third liquid heat exchanger and the fourth liquid heat exchanger can be thermally managed.
The embodiment of the application provides an energy storage charging station, which can realize the heat exchange between an energy storage system and a charging system by intensively managing the heat of the energy storage system and the charging system, wherein a cooling medium in a cooling medium loop flows through the charging system and the energy storage system respectively, the charging system and the energy storage system are in heat exchange with the cooling medium loop, and the heat generated by the charging system during operation is transmitted to the energy storage system through the cooling medium loop for use, so that the energy consumption required by the maintenance of the temperature of energy storage heating is reduced, and the energy utilization efficiency is improved.
Drawings
Fig. 1 is a schematic diagram of an energy storage charging station according to an embodiment of the present application;
fig. 2 is a schematic diagram of a first energy storage charging station according to an embodiment of the present application;
Fig. 3 is a schematic diagram of a first energy storage charging station according to an embodiment of the present application in a first mode;
Fig. 4 is a schematic diagram of a first energy storage charging station according to an embodiment of the present application in a second mode;
fig. 5 is a schematic diagram of a first energy storage charging station according to an embodiment of the present application in a third mode;
Fig. 6 is a schematic diagram of a first energy storage charging station according to an embodiment of the application in a fourth mode;
fig. 7 is a schematic diagram of a first energy storage charging station according to an embodiment of the application in a fifth mode;
fig. 8 is a schematic diagram of a first energy storage charging station according to an embodiment of the application in a sixth mode;
Fig. 9 is a schematic diagram of a second energy storage charging station according to an embodiment of the application;
Fig. 10 is a schematic diagram of a second energy storage charging station according to an embodiment of the application in a first mode;
FIG. 11 is a schematic diagram of a second energy storage charging station according to an embodiment of the application in a second mode;
fig. 12 is a schematic diagram of a second energy storage charging station according to an embodiment of the application in a third mode;
fig. 13 is a schematic diagram of a second energy storage charging station according to an embodiment of the application in a fourth mode;
fig. 14 is a schematic diagram of a second energy storage charging station according to an embodiment of the application in a fifth mode;
fig. 15 is a schematic diagram of a second energy storage charging station according to an embodiment of the application in a sixth mode;
fig. 16 is a schematic diagram of a third energy storage charging station according to an embodiment of the application;
fig. 17 is a schematic diagram of a third energy storage charging station according to an embodiment of the application in a first mode;
fig. 18 is a schematic diagram of a third energy storage charging station according to an embodiment of the application in a second mode;
fig. 19 is a schematic diagram of a third energy storage charging station according to an embodiment of the application in a third mode;
fig. 20 is a schematic diagram of a third energy storage charging station according to an embodiment of the application in a fourth mode;
fig. 21 is a schematic diagram of a third energy storage charging station according to an embodiment of the application in a fifth mode;
fig. 22 is a schematic diagram of a third energy storage charging station according to an embodiment of the application in a sixth mode.
Reference numerals illustrate:
100-heat exchange components; 101-a first cooling medium circuit; 102-a second cooling medium circuit; 110-a charging member heat exchanger; 111-a first energy storage heat exchanger; 112-a second energy storage heat exchanger; 113-a third energy storage heat exchanger; 114-an electric heating unit;
121-a first intermediate communication line; 122-a second intermediate communication line; 123-a third intermediate communication line; 124-a fourth intermediate communication line;
131-a first liquid heat exchanger; 132-a second liquid heat exchanger; 133-a third liquid heat exchanger; 134-a fourth liquid heat exchanger;
141-a first air heat exchanger; 142-a second air heat exchanger; 143-a third air heat exchanger; 144-fourth air heat exchanger; 145-a fifth air heat exchanger; 146-sixth air heat exchanger; 147-seventh air heat exchanger;
151-a first compressor; 152-a first reversing valve; 153-a second compressor; 154-a second reversing valve; 155-a third compressor; 156-a liquid storage tank;
161-a first throttle valve; 162-a second throttle valve; 163-third throttle valve; 164-a fourth throttle valve; 165-a fifth throttle valve; 166-sixth throttle valve;
171-a first communication valve; 172-a second communication valve; 173-a third communication valve; 174-fourth communication valve; 175-a fifth communication valve; 176-a sixth communication valve; 177-a seventh communication valve; 178-eighth communication valve;
181-a first control valve; 182-a second control valve; 183-third control valve; 184-fourth control valve; 185-fifth control valve; 186-sixth control valve; 187-seventh control valve;
191-a first liquid pump; 192-a second liquid pump; 193-third liquid pump; 194-fourth liquid pump; 200-an energy storage system; 300-charging system.
Detailed Description
The embodiment of the application provides an energy storage charging station which is used for charging electric devices or equipment such as an electric automobile and an electric bicycle, can be arranged indoors or outdoors and can be connected with an urban power grid, wherein the energy storage charging station is provided with an energy storage system and a charging system, the charging system can be connected with external electric devices needing to be charged, and the charging system can directly charge the electric devices through the power grid or can also supply power for the charging system by the energy storage system, so that the electric devices can be charged by utilizing the stored electric energy of the energy storage system.
The charging system generally includes an electric energy conversion unit, specifically, a Direct Current/alternating Current conversion unit (ALTERNATING CURRENT/Direct Current, AC/DC convertor) and a Direct Current/Direct Current conversion unit (DC/DC convertor), which can convert high-voltage alternating Current output by a power grid to adapt to an input voltage required by an electric device when the electric device is charged, and the electric energy conversion unit generates heat due to a Current heating effect when working, if the temperature is too high, a circuit failure or even burnout of the electric energy conversion unit may be caused, so when the temperature of an external working environment is high, the electric energy conversion unit needs to be cooled when the electric energy conversion unit generates heat.
In addition, the energy storage system mainly comprises a battery, in order to maintain a good energy storage state of an electric core of the battery, the working environment temperature of the battery needs to be maintained in a proper range, and for example, the lithium ion battery commonly adopted in the energy storage system has a narrower optimal working temperature range and is generally between 20 ℃ and 40 ℃, so that when the environment temperature is lower, the battery needs to be heated and maintained, and when the environment temperature is higher, the battery needs to be cooled and lowered, so that the battery is always kept in the proper working temperature range.
Therefore, the energy storage charging station needs to adjust the working temperatures of the charging system and the energy storage system by the thermal management system to ensure continuous and effective operation of the equipment, and the task of the thermal management system mainly has two aspects, namely, cooling when the charging system is overheated and maintaining the working temperature of the energy storage system within a proper range.
In the related art, the temperature control of the energy storage system and the cooling of the charging system by the thermal management system are relatively independent, and when the temperature of the energy storage system is regulated, the heating is usually realized by a heater, the principle is that the current heating effect is utilized, the cooling of the energy storage system is mainly realized by an air-water heat exchanger or a plate heat exchanger, and correspondingly, the cooling of the charging system is usually realized by the air-water heat exchanger. The heat management system may form a refrigerant circulation loop, and when the energy storage system and the charging system are subjected to heat management, two relatively independent refrigerant circulation loops are formed, or the energy storage system and the charging system are correspondingly arranged on two non-interfering parallel branches of one refrigerant circulation loop.
However, the heat management manners of the energy storage system and the charging system do not establish and perform heat interaction between the two, the energy storage system only uses the heater to heat, the energy consumption required for maintaining the temperature is high, and for the charging system, the heat generated during the operation of the charging system in a low-temperature scene can be dispersed and overflowed into the environment and cannot be utilized, so that the energy waste is caused, and therefore, the overall energy consumption of the energy storage charging station is high, and the energy utilization rate is low.
Based on the technical problems, the embodiment of the application provides the energy storage charging station, heat exchange between the energy storage system and the charging system can be realized by intensively managing the heat of the energy storage system and the charging system, the energy storage system and the charging system can realize independent heat management functions, the charging system works to generate heat in a low-temperature application scene, and when the energy storage system needs to be heated to maintain the temperature, the heat generated by the work of the charging system can be transferred to the energy storage system for maintaining the temperature, so that the energy consumption required by the heating and the temperature maintenance of the energy storage is reduced, the heat waste is reduced, and the energy utilization efficiency of the energy storage charging station is improved.
As shown in fig. 1, an embodiment of the present application provides an energy storage charging station, where the energy storage charging station may include a heat exchange assembly 100, an energy storage system 200 and a charging system 300, where the energy storage system 200 is used for storing electric energy, the charging system 300 is used for charging electric devices, the heat exchange assembly 100 is used for thermally managing the energy storage system 200 and the charging system 300, the energy storage charging station is connected to an external urban power grid, the charging system 300 may directly charge the external electric devices by the power grid in a loose electricity trough period, and if the stored electric quantity of the energy storage system 200 is not saturated, the charging system 300 may also charge the external electric devices by the external power grid in the trough period, and supplement the electric energy, and the charging system 300 may charge the external devices via the energy storage system 200 in a tense electricity peak period, thereby fully utilizing the electric energy resources and reducing the electricity cost.
The heat exchange assembly 100 may include a cooling medium circuit, wherein the cooling medium in the cooling medium circuit flows through the charging system 300 and the energy storage system 200, respectively, and the charging system 300 and the energy storage system 200 may be thermally managed by controlling the change of the circulation path of the cooling medium circuit, and when the charging system 300 is thermally managed, the cooling medium in the cooling medium circuit may exchange heat with the charging system 300 when flowing through the charging system 300, and when the energy storage system 200 is thermally managed, the cooling medium in the cooling medium circuit may exchange heat with the energy storage system 200 when flowing through the energy storage system 200.
It can be appreciated that the cooling medium in the cooling medium circuit can absorb the heat of the charging system 300 to cool the charging system 300 when the operating temperature of the charging system 300 is high, and can exchange heat with the energy storage system 200 to maintain the operating temperature within a proper range when the ambient temperature of the energy storage system 200 exceeds the proper operating range.
In addition, in a low-temperature working environment, heat generated during the working of the charging system 300 can be transferred to the cooling medium in the cooling medium loop, and meanwhile, the cooling medium in the cooling medium loop can transfer the heat to the energy storage system 200 for heating, so that the heat generated during the working of the charging system 300 is transferred to the energy storage system 200 through the cooling medium loop, heat interaction can be performed between the cooling medium loop and the energy storage system 200, energy consumption required by maintaining the temperature during the heating of the energy storage is reduced, and energy utilization efficiency is improved.
It should be noted that, when the energy storage system 200 needs to dissipate heat, the heat of the energy storage system may be transmitted through the cooling medium circuit and finally transmitted to the external environment, and when the energy storage system 200 needs to be heated, the energy storage system 200 may have different heat sources, first, the cooling medium in the cooling medium circuit absorbs the heat from the external environment through circulation and transmits the heat to the energy storage system 200 through the cooling medium, second, the heat exchange component 100 may be provided with a component for converting the electric energy into the heat energy, so as to heat the cooling medium, thereby transmitting the heat to the energy storage system 200, third, the cooling medium may absorb the heat from the charging system 300 and transmit the heat to the energy storage system 200 through circulation of the cooling medium circuit. The heating modes of the three energy storage systems 200 may be any one of them or may be a combination of two or more of them in the specific embodiment of the cooling medium circuit.
In the energy storage charging station provided by the embodiment of the application, when the heat exchange assembly 100 performs thermal management on the energy storage system 200 and the charging system 300, a plurality of specific working modes can be realized, and the selection can be performed according to specific working environments, and the main working modes of the energy storage charging station are as follows: 1. the energy storage system 200 is independently heated, the energy storage system 200 is heated by using the working heat of the charging system 300, the charging system 300 is not independently cooled, the energy storage system 200 is heated by using the working heat of the charging system 300, the charging system 300 is independently cooled, the energy storage system 200 is independently cooled, the charging system 300 is independently cooled, and the energy storage system 200 and the charging system 300 are simultaneously cooled.
To achieve the various modes of operation described above, the heat exchange assembly 100 may include at least two cooling medium circuits, e.g., as shown in fig. 1, the heat exchange assembly 100 may include two cooling medium circuits, a first cooling medium circuit 101 and a second cooling medium circuit 102, respectively, the first cooling medium circuit 101 may be configured to exchange heat with the energy storage system 200, the second cooling medium circuit 102 may be configured to cool the charging system 300, and the first cooling medium circuit 101 and the second cooling medium circuit 102 may be in communication or may have heat exchange.
It will be appreciated that the heat exchange assembly 100 may also include three or four coolant loops, and in the embodiment of the present application, two coolant loops are described as an example.
The separate heating and cooling of the energy storage system 200 may be achieved by its heat exchange with the first cooling medium circuit 101, whereas the separate cooling of the charging system 300 may be achieved by its heat exchange with the second cooling medium circuit 102, whereas the heat exchange between the charging system 300 and the energy storage system 200 may be achieved by the heat exchange between the first cooling medium circuit 101 and the second cooling medium circuit 102, such that the cooling medium in the second cooling medium circuit 102 may directly or indirectly exchange heat with the energy storage system 200.
It should be noted that, when the energy storage system 200 needs to be heated by using the working heat of the charging system 300 in the low temperature state, after the cooling medium in the second cooling medium circuit 102 absorbs the heat of the charging system 300, if the first cooling medium circuit 101 is communicated with the second cooling medium circuit 102, the cooling medium may directly flow into the first cooling medium circuit 101, and form a circulation therebetween, at this time, the heat is transferred to the energy storage system 200 in a direct heat exchange manner, and if the first cooling medium circuit 101 and the second cooling medium circuit 102 are not communicated, the cooling medium in the two forms a relatively independent circulation, and then the heat is transferred to the energy storage system 200 in an indirect heat exchange manner.
In order to enable the cooling medium in the second cooling medium circuit 102 to perform efficient heat exchange with the charging system 300, referring to fig. 2, the heat exchange assembly 100 may further include a charging member heat exchanger 110, where the charging member heat exchanger 110 may be communicated with the second cooling medium circuit 102 and configured to be disposed opposite to the charging system 300 and perform heat exchange, so that when the charging assembly needs to cool, heat can be efficiently absorbed, and when working heat of the charging system 300 needs to be utilized, heat dissipation loss during working of the charging system 300 can be reduced.
In addition, the energy storage system 200 can exchange heat with the first cooling medium circuit 101 through the energy storage heat exchanger, so as to ensure the accuracy of temperature maintenance and reduce the error or hysteresis of temperature adjustment.
In addition to the manner in which the cooling medium circuit exchanges heat with the energy storage system 200 and the heat exchange system, the circulation path may be changed between different cooling medium circuits, and different heat exchange manners may be adopted between different cooling medium circuits or between the cooling medium circuit and the external environment.
The heat exchange assembly 100 can comprise at least one liquid heat exchanger, wherein the liquid heat exchanger is provided with a first liquid heat exchange channel and a second liquid heat exchange channel, and the first liquid heat exchange channel and the second liquid heat exchange channel of the same liquid heat exchanger are in heat exchange, when the cooling medium circuit is arranged, the cooling medium circuit which is not communicated can be communicated with the different liquid heat exchange channels of the liquid heat exchanger, so that heat in the cooling medium circuit with higher temperature can be transferred to the cooling medium circuit with lower temperature, high-efficiency heat exchange is realized under the condition that the different cooling medium circuits are not directly communicated, and heat loss of the cooling medium in the circulation process is avoided.
It will be appreciated by those skilled in the art that the cooling medium can be either a refrigerant, which absorbs or releases heat by phase change when it is a refrigerant, or a secondary refrigerant, which does not change its phase state during heat exchange, and the specific heat exchange means can be heat conduction or heat convection, etc., and exemplary refrigerants can include, but are not limited to, tetrafluoroethane (formula C 2H2F4, R134a for short), difluoromethane (formula CHCIF 2, R22 for short), etc., or other mixed refrigerants, such as mixed refrigerants of difluoromethane and pentafluoroethane mixed at fifty percent (R410 a for short); and the coolant can include, but is not limited to, aqueous glycol solutions, fluorinated liquids, oils, and other cold-carrying media. The cooling medium in the following embodiments of the present application may be either a refrigerant or a coolant unless otherwise specified, and is not specifically exemplified.
It should be noted that, the charging system 300 may include a plurality of power conversion modules, including but not limited to an AC/DC module and a DC/DC module, and the charging member heat exchanger 110 may be divided into a plurality of branches to enter the cooling liquid plate to dissipate heat of each module when performing heat exchange with the charging system 300. In the energy storage system 200, a plurality of battery packs may be included, the battery packs may have a plurality of batteries, and the energy storage heat exchanger may also be divided into a plurality of branches and then enter the cooling liquid plates inside the battery packs to exchange heat with the batteries.
In the embodiment of the present application, the energy storage system 200, the charging system 300 and the heat exchange assembly 100 utilize the cooling medium circuit to realize different working modes under different working environments, and the switching between the different working modes also mainly depends on the change of the circulation path of the cooling medium circuit in the heat exchange assembly 100, and the different thermal management modes of the energy storage charging station will be described in detail through the description of the specific structure of the cooling medium circuit in the heat exchange assembly 100.
Referring to fig. 2, in a first possible embodiment, the first cooling medium circuit 101 may utilize its own cooling medium circulation to dissipate heat from or heat the energy storage system 200, and meanwhile, the first cooling medium circuit 101 may exchange heat with the second cooling medium circuit 102, absorb heat of the second cooling medium circuit 102 to dissipate heat from the charging system 300, or absorb heat of the charging system 300 to heat the energy storage system 200.
Wherein, referring to fig. 2, the liquid heat exchanger may include a first liquid heat exchanger 131, heat of the second cooling medium circuit 102 may be transferred to the first cooling medium circuit 101 by using the first liquid heat exchanger 131, or heat of the first cooling medium circuit 101 may be transferred to the second cooling medium circuit 102, the second cooling medium circuit 102 is connected to a first liquid heat exchanging channel in the first liquid heat exchanger 131, and the second liquid heat exchanging channel of the first liquid heat exchanger 131 communicates with the first cooling medium circuit 101.
Referring to fig. 2, the heat exchange assembly 100 may include a first energy storage heat exchanger 111, the first energy storage heat exchanger 111 is communicated with the first cooling medium circuit 101, the cooling medium in the first cooling medium circuit 101 may be a refrigerant, the first energy storage heat exchanger 111 is configured to exchange heat with the energy storage system 200 through phase change of the cooling medium, the cooling medium in the first cooling medium circuit 101 may generate phase change when flowing through the first energy storage heat exchanger 111, and absorb or release heat in the process, so as to heat or cool the energy storage system 200, thereby improving heat exchange efficiency.
In order to realize the heat dissipation or heating function of the first cooling medium circuit 101, the first cooling medium circuit 101 may further include a first heat pump assembly (not shown), a first air heat exchanger 141, and a first throttle valve 161, and the first heat pump assembly, the first air heat exchanger 141, the first throttle valve 161, and the first energy storage heat exchanger 111 may be sequentially connected.
Wherein a first end of the first liquid heat exchanger 131 may be connected to the first air heat exchanger 141, a second end of the first liquid heat exchanger 131 may be connected between the first heat pump assembly and the first energy storage heat exchanger 111, and the heat exchange assembly 100 may further comprise a first valve assembly configured to control a communication state of the first liquid heat exchanger 131 in the first cooling medium circuit 101.
With continued reference to fig. 2, the first heat pump assembly includes a first compressor 151 and a first reversing valve 152 connected in sequence, where the first compressor 151 and the first reversing valve 152 are both connected in the first cooling medium circuit 101, and the first compressor 151 is used to drive the cooling medium in the first cooling medium circuit 101 to flow, and the first reversing valve 152 is used to change the flow direction of the cooling medium in the first cooling medium circuit 101.
It is appreciated that the first cooling medium circuit 101 may be configured to form a complete cooling medium circulation path, and that the phase change of the cooling medium may be independently utilized to effect cooling or heating of the energy storage system 200 without heat exchange between the first cooling medium circuit 101 and the other cooling medium circuits.
It should be noted that, the first compressor 151 is a power source for circulating the cooling medium in the first cooling medium circuit 101, and the first reversing valve 152 may be a combination of a four-way reversing valve, an electromagnetic valve, or a one-way valve, for example, the four-way reversing valve may have two stations, where the two stations respectively correspond to the connection direction of the first compressor 151 in the first cooling medium circuit 101, that is, respectively correspond to the forward flow and the reverse flow of the cooling medium, and between the first compressor 151 and the first reversing valve 152, a liquid storage tank 156 may be connected to the liquid storage tank 156, so as to ensure continuous and stable circulation in the first cooling medium circuit 101.
In order to realize the switching of the heat exchange assembly 100 in different operation modes, the first valve assembly may include a first communication valve 171 and a second communication valve 172, the first cooling medium circuit 101 may further include a first intermediate communication pipe 121, the first communication valve 171 is connected between the first air heat exchanger 141 and the first throttle valve 161, a first end of the first liquid heat exchanger 131 is connected between the first communication valve 171 and the first air heat exchanger 141, a second end of the first liquid heat exchanger 131 is connected between the first communication valve 171 and the first throttle valve 161 through the first intermediate communication pipe 121, and the second communication valve 172 is connected to the first intermediate communication pipe 121.
The circulation loop of the first cooling medium can be changed by changing the opening and closing of different communication valves in the first valve assembly, so that the cooling medium in the circulation loop flows through the first liquid heat exchanger 131, thereby performing heat exchange with the cooling medium in the second cooling medium loop, and further transferring the heat of the charging system 300 to the energy storage system 200 when the charging system 300 works in a low temperature state.
The first valve assembly may further include a third communication valve 173 and a fourth communication valve 174, and the second end of the first liquid heat exchanger 131 is connected between the first heat pump assembly and the first energy storage heat exchanger 111 through the third communication valve 173; the first cooling medium circuit 101 further includes a second throttle valve 162, and the fourth communication valve 174 is connected in parallel with the second throttle valve 162 between the first air heat exchanger 141 and the first end of the first liquid heat exchanger 131.
It will be appreciated that by providing the third communication valve 173 and the fourth communication valve 174, the circulation loop of the first cooling medium may be changed, such that the first energy storage heat exchanger 111 and the first liquid heat exchanger 131 form two relatively independent branches, and thus cooling of one of the energy storage system 200 and the charging system 300, or both, may be achieved when the ambient temperature is high.
In addition, to accommodate the different heat dissipation requirements of the charging system 300, the second cooling medium circuit 102 may form a variable multi-medium heat dissipation path, where the second cooling medium circuit 102 may further include a fourth air heat exchanger 144 and a second control valve 182, the second control valve 182 is connected between the charging member heat exchanger 110 and the first liquid heat exchanger 131, and a first interface and a second interface of the second control valve 182 are respectively connected with one ends of the charging member heat exchanger 110 and the first liquid heat exchanger 131; the first end of the fourth air heat exchanger 144 is connected to the third interface of the second control valve 182, and the second end of the fourth air heat exchanger 144 is connected to the other end of the first liquid heat exchanger 131, so that the second cooling medium circuit 102 can radiate heat from the cooling medium in the second cooling medium circuit 102 by using the fourth air heat exchanger 144 while transferring heat of the charging system 300 to the first cooling medium circuit 101, so as to assist the charging system 300 in cooling.
The second cooling medium circuit 102 may further include a third control valve 183, the third control valve 183 is connected to the fourth intermediate communication line 124, the first port and the second port of the third control valve 183 are connected to the fourth air heat exchanger 144 and the charging member heat exchanger 110, respectively, and the third port of the third control valve 183 is connected between the second control valve 182 and the first liquid heat exchanger 131.
It will be appreciated that the cooling medium in the second cooling medium circuit 102 can be a coolant, and that a first liquid pump 191 can be connected in the second cooling medium circuit 102 to drive the flow of coolant, and that the first liquid pump 191 can be connected anywhere in the main circulation circuit in the second cooling medium circuit 102, for example, between the first liquid heat exchanger 131 and the charge heat exchanger 110.
When the working temperature of the charging system 300 is high and heat dissipation is required, the second cooling medium circuit 102 can have two heat dissipation modes, namely, air heat exchanger heat dissipation and liquid heat exchanger heat dissipation, and the second control valve 182 and the third control valve 183 can be used for selecting the unused cooling medium circulation circuit, so that different heat dissipation modes or the combination of heat dissipation modes can be selected under different temperature states, and the energy consumption is reduced while the sufficient heat dissipation efficiency is ensured.
It should be noted that, the above-mentioned communication valve can be through the break-make of switching control cooling medium return circuit, and the control valve can be through the break-make and the branch road flow direction of switching control cooling medium return circuit, and the communication valve can be two-way valve, and the control valve can be three-way valve or other multiway valves, and both can be the solenoid valve, and the concrete structure and the theory of operation of solenoid valve are prior art, and this is not repeated. In addition, the working mode of the liquid heat exchanger is to realize the heat exchange process by utilizing heat conduction or heat convection between the liquid loop and the liquid loop, the working mode of the air heat exchanger is to utilize outside air to exchange heat with the cooling medium loop, and the specific structure and the working principle of the two are both in the prior art and are not repeated here.
In the above embodiment, the circulation paths of the different cooling medium circuits in the different operation modes will be described in detail.
1. The energy storage system 200 is heated separately.
Referring to fig. 3, at this time, the first cooling medium circuit 101 is operated in the heat pump mode, the first compressor 151 is operated, the high-temperature and high-pressure refrigerant gas discharged from the first compressor 151 passes through the first reversing valve 152 and enters the first energy storage heat exchanger 111, and heats the energy storage system 200 while flowing through the first energy storage heat exchanger 111, and the refrigerant is condensed into a liquid state, so that the first energy storage heat exchanger 111 functions as a condenser. Thereafter, the refrigerant flows through the first throttle valve 161, at this time, the first communication valve 171 is turned on, and the second communication valve 172 is turned off, the refrigerant flowing out of the first throttle valve 161 enters the first air heat exchanger 141, evaporates into a gas state after absorbing heat of the outside air in the first air heat exchanger 141, and then returns to the first compressor 151 through the first reversing valve 152 and the liquid tank 156, completing the cycle.
2. The energy storage system 200 is heated by the operating heat of the charging system 300 while the charging system 300 is not separately cooled.
Referring to fig. 4, the energy storage system 200 is heated by the waste heat of the charging system 300. The first cooling medium circuit 101 is operated in the heat pump mode, the first compressor 151 is operated, the high-temperature and high-pressure refrigerant gas discharged from the first compressor 151 passes through the first reversing valve 152 and then enters the first energy storage heat exchanger 111, the energy storage system 200 is heated when flowing through the first energy storage heat exchanger 111, and meanwhile, the refrigerant is condensed into a liquid state, and at this time, the first energy storage heat exchanger 111 functions as a condenser. The refrigerant flowing out of the first energy storage heat exchanger 111 flows through the first throttle 161, at this time, the first communication valve 171 is opened, the second communication valve 172 is closed, the refrigerant flows through the first intermediate communication line 121 to enter the first liquid heat exchanger 131, heat exchange is performed between the refrigerant and the cooling medium in the second cooling medium circuit 102 in the first liquid heat exchanger 131, heat transferred from the charging system 300 is absorbed, the first communication valve 171 is in a closed state, the refrigerant evaporated into a gaseous state flows into the first air heat exchanger 141, and the refrigerant returns to the first compressor 151 from the first air heat exchanger 141 through the first reversing valve 152 and the liquid tank 156, and circulation is completed.
In the circulation of the second cooling medium circuit 102, the first liquid pump 191 is operated, the cooling medium enters the charging member heat exchanger 110 to be heated by the working heat of the charging system 300, the first port of the second control valve 182 is communicated with the second port, the cooling medium directly flows into the first liquid heat exchanger 131 through the second control valve 182, the heat is transferred to the refrigerant in the first cooling medium circuit 101, and finally, the cooling medium returns to the first liquid pump 191.
3. The energy storage system 200 is heated by the operating heat of the charging system 300 while the charging system 300 is cooled separately.
Referring to fig. 5, the energy storage system 200 is heated by the waste heat of the charging system 300. The refrigerant circulation path in the first cooling medium circuit 101 is the same as that in the aforementioned second mode, and will not be described here again.
In the circulation of the second cooling medium circuit 102, the first liquid pump 191 is operated, the cooling medium enters the charging member heat exchanger 110 to be heated by the working heat of the charging system 300, the first port of the second control valve 182 is simultaneously communicated with the second port and the third port, at this time, the cooling medium enters the fourth air heat exchanger 144 while flowing into the first liquid heat exchanger 131, the cooling medium entering the first liquid heat exchanger 131 transfers heat to the refrigerant in the first cooling medium circuit 101, and then returns to the first liquid pump 191, and the cooling medium entering the fourth air heat exchanger 144 dissipates heat to the outside air, the first port of the third control valve 183 is communicated with the second port, and then the cooling medium flowing out of the fourth air heat exchanger 144 returns to the first liquid pump 191 through the third control valve 183. In this mode, when the heating power of the charging system 300 is larger and exceeds the heating power required by the energy storage system 200, part of the heat can be dissipated to the external environment.
4. The energy storage system 200 is cooled separately.
Referring to fig. 6, the first cooling medium circuit 101 is operated in the compressor refrigeration mode, the first compressor 151 is operated, the high-temperature and high-pressure refrigerant gas discharged from the compressor enters the first air heat exchanger 141 through the first reversing valve 152, the first air heat exchanger 141 acts as a condenser, the refrigerant is condensed into low-temperature and low-pressure refrigerant liquid through the first throttle 161 after passing through the first communication valve 171, the refrigerant liquid enters the first energy storage heat exchanger 111 to absorb the heat of the energy storage system 200, the first energy storage heat exchanger 111 acts as an evaporator, and the refrigerant evaporated into gas in the first energy storage heat exchanger 111 returns to the first compressor 151 through the first reversing valve 152 and the liquid storage tank 156 to complete the cycle.
5. The charging system 300 is cooled separately.
Referring to fig. 7, in the circulation of the second cooling medium circuit 102, the first liquid pump 191 is operated, the cooling medium enters the charging member heat exchanger 110 from the first liquid pump 191, absorbs the heat generated by the charging system 300, and then enters the fourth air heat exchanger 144 through the first interface and the third interface of the second control valve 182 for heat dissipation and cooling, and if the temperature of the cooling medium detected by the temperature detecting unit (not shown) in the system is not higher than the preset value, the first interface and the second interface of the third control valve 183 are communicated, and the cooling medium can directly flow back to the first liquid pump 191 to complete the circulation after entering the third control valve 183 through the fourth intermediate communication pipeline 124; if the temperature of the cooling medium detected by the temperature detecting unit in the system is higher than the preset value, the first port and the third port of the third control valve 183 are communicated, the cooling medium may flow into the first liquid heat exchanger 131 after entering the third control valve 183 through the fourth intermediate communication pipe 124, be cooled down and cooled down further by the refrigerant in the first cooling medium circuit 101, and then return to the first liquid pump 191 to complete the circulation.
If the second cooling medium circuit 102 flows through the first liquid heat exchanger 131, the first cooling medium circuit 101 is operated in the compressor refrigeration mode, the first compressor 151 is operated, the high-temperature and high-pressure refrigerant gas discharged from the compressor enters the first air heat exchanger 141 through the first reversing valve 152, the first air heat exchanger 141 functions as a condenser, the first communication valve 171 and the fourth communication valve 174 are opened, the refrigerant is condensed into low-temperature and low-pressure refrigerant liquid through the second throttling valve 162, the refrigerant liquid enters the first liquid heat exchanger 131 to absorb heat of the cooling medium in the second cooling medium circuit 102, the first liquid heat exchanger 131 functions as an evaporator, the second communication valve 172 is opened, the third communication valve 173 is closed, and the refrigerant evaporated into gas in the first liquid heat exchanger 131 returns to the first compressor 151 through the third communication valve 173, the first reversing valve 152 and the liquid storage tank 156 in sequence, so as to complete the cycle.
6. The energy storage system 200 and the charging system 300 are simultaneously cooled.
Referring to fig. 8, the heat exchange assembly 100 is only required to enter the fifth and sixth modes at the same time, and will not be described herein.
Referring to fig. 9, in a second possible embodiment, the difference from the foregoing embodiment is that, in the thermal management system formed by the heat exchange assembly 100, a third cooling medium circuit may be included in addition to the first cooling medium circuit 101 and the second cooling medium circuit 102, and the liquid heat exchanger may include a second liquid heat exchanger 132 in addition to the first liquid heat exchanger 131, where each of the first cooling medium circuit 101, the second cooling medium circuit 102, and the third cooling medium circuit may form a relatively independent cooling medium cycle, the second cooling medium circuit 102 and the third cooling medium circuit may exchange heat through the first liquid heat exchanger 131, and the first cooling medium circuit 101 and the third cooling medium circuit may exchange heat through the second liquid heat exchanger 132.
The first liquid heat exchange channel of the second liquid heat exchanger 132 is connected to the first cooling medium circuit 101, the second liquid heat exchange channel of the second liquid heat exchanger 132 is connected to the third cooling medium circuit in a switchable manner, the second liquid heat exchange channel of the first liquid heat exchanger 131 is connected to the third cooling medium circuit in a switchable manner, and when the second liquid heat exchange channel of the second liquid heat exchanger 132 and the second liquid heat exchange channel of the first liquid heat exchanger 131 are both in a communication state, the third cooling medium circuit exchanges heat between the first cooling medium circuit 101 and the second cooling medium circuit 102.
It will be appreciated that by providing the third cooling medium circuit, a cooling medium circuit other than the first cooling medium circuit 101 and the second cooling medium circuit 102 may be used as an intermediary, on the one hand, the third cooling medium circuit may establish a heat exchange relationship between the first cooling medium circuit 101 and the external environment, and between the second cooling medium circuit 102 and the external environment, so that the energy storage system 200 may exchange heat with the external environment, thereby implementing heat dissipation or heating, and also may exchange heat between the charging system 300 and the external environment, thereby implementing heat dissipation of the charging system 300, and on the other hand, the third cooling medium circuit may establish a heat exchange relationship between the first cooling medium circuit 101 and the second cooling medium circuit 102, thereby enabling indirect heat exchange between the first cooling medium circuit 101 and the second cooling medium circuit 102, and implementing heating of the energy storage system 200 by using heat generated during operation of the charging system 300.
Referring to fig. 9, a second heat pump assembly (not shown), a second air heat exchanger 142, a third throttle valve 163 and a fourth throttle valve 164 may be included in the third cooling medium circuit, the second heat pump assembly, the second air heat exchanger 142 and the liquid heat exchanger are sequentially connected, the third throttle valve 163 is connected between the first end of the first liquid heat exchanger 131 and the second air heat exchanger 142, the second end of the first liquid heat exchanger 131 is connected with the heat pump assembly, the fourth throttle valve 164 is connected between the first end of the second liquid heat exchanger 132 and the second air heat exchanger 142, the second end of the second liquid heat exchanger 132 is connected with the second heat pump assembly, the second heat pump assembly includes a second compressor 153 and a second reversing valve 154 which are sequentially connected, each of the second compressor 153 and the second reversing valve 154 is connected in the third cooling medium circuit, and the second compressor 153 is used for driving the flow of the cooling medium in the third cooling medium circuit, and the second reversing valve 154 is used for changing the flow direction of the cooling medium in the third cooling medium circuit.
It should be noted that the cooling medium in the third cooling medium circuit may be a refrigerant, and the connection and the action of the second compressor 153 and the second reversing valve 154 in the third cooling medium circuit are similar to the connection and the action of the first compressor 151 and the first reversing valve 152 in the first cooling medium circuit 101 in the foregoing first embodiment, and a liquid storage tank 156 may be connected therebetween, which is not described herein again.
By changing the flow direction of the cooling medium in the third cooling medium loop, different functions of the second liquid heat exchanger 132 in the third cooling medium loop can be respectively realized, the second liquid heat exchanger 132 can be used as a condenser for heating, at the moment, the second air heat exchanger 142 correspondingly plays a role of an evaporator, the second liquid heat exchanger 132 can be used as the evaporator for absorbing heat to realize cooling, at the moment, the second air heat exchange correspondingly plays a role of a condenser, and therefore heat dissipation or heating of the energy storage system 200 can be realized.
To achieve switching of the heat exchange assembly 100 in different operation modes, the heat exchange assembly 100 further comprises a second valve assembly configured to control the communication state of the first liquid heat exchanger 131 and the second liquid heat exchanger 132 with the third cooling medium circuit, respectively, as shown in fig. 9, the second valve assembly may comprise a fifth communication valve 175 and a sixth communication valve 176, and the third cooling medium circuit further comprises a second intermediate communication pipe 122, the fifth communication valve 175 is connected between the fourth throttle valve 164 and the second air heat exchanger 142, the first end of the first liquid heat exchanger 131 is connected with the third throttle valve 163, the second end of the first liquid heat exchanger 131 is connected between the fifth communication valve 175 and the fourth throttle valve 164 through the second intermediate communication pipe 122, and the sixth communication valve 176 is connected with the second intermediate communication pipe 122.
It will be appreciated that by providing the second valve assembly, the circulation path of the cooling medium in the third cooling medium circuit may be changed so that the third cooling medium circuit may also absorb heat of the second cooling medium circuit 102, and heat the first cooling medium circuit 101 when exchanging heat with the first cooling medium circuit 101 by using the heat, thereby improving energy utilization.
In addition, in order to enable the third cooling medium circuit to dissipate heat of the second cooling medium circuit 102, the second valve assembly may further include a seventh communication valve 177 and an eighth communication valve 178, the seventh communication valve 177 being connected between the second end of the first liquid heat exchanger 131 and the second heat pump assembly, both ends of the eighth communication valve 178 being respectively connected in parallel to both ends of the third throttle valve 163, thereby forming two selectable on-off parallel branches.
By providing the seventh communication valve 177 and the eighth communication valve 178, the flow path of the cooling medium in the third cooling medium circuit can be changed, so that the cooling medium in the third cooling medium circuit flows through the first liquid heat exchanger 131 when the working temperature of the charging system 300 is higher, and heat in the first refrigerant circuit can be absorbed, thereby realizing cooling of the charging system 300.
After the heat exchange between the third cooling medium circuit and the first cooling medium circuit 101, the heat dissipation or heating of the energy storage system 200 needs to be performed by the first cooling medium circuit 101, and the structure of the first cooling medium circuit 101 will be described below.
The first cooling medium circuit 101 may include a second energy storage heat exchanger 112 and a third air heat exchanger 143, where the second energy storage heat exchanger 112, the third air heat exchanger 143, and the first liquid heat exchange channel of the second liquid heat exchanger 132 are sequentially connected, the second energy storage heat exchanger 112 is configured to exchange heat with the energy storage system 200, the first cooling medium circuit 101 further includes a first control valve 181, the first control valve 181 is connected between the third air heat exchanger 143 and the second liquid heat exchanger 132, and a first interface and a second interface of the first control valve 181 are respectively connected with the first ends of the third air heat exchanger 143 and the second liquid heat exchanger 132, and a third interface of the first control valve 181 is connected between the second end of the second liquid heat exchanger 132 and the second energy storage heat exchanger 112.
It can be appreciated that when the working temperature of the energy storage system 200 is high and heat dissipation is required, the first cooling medium circuit 101 may have two heat dissipation modes, i.e. an air-liquid heat exchange mode and a liquid-liquid heat exchange mode, and the first control valve 181 may be used to select a cooling medium circulation circuit that is not used, so that different heat dissipation modes or combinations of heat dissipation modes are selected in different temperature states, thereby reducing energy consumption while ensuring sufficient heat dissipation efficiency.
In addition, in the present embodiment, the cooling medium in the first cooling medium circuit 101 may be a coolant, and a second liquid pump 192 may be connected to the first cooling medium circuit 101 to drive the coolant to flow, and the second liquid pump 192 may be connected to any position of the main circulation circuit in the first cooling medium circuit 101, for example, may be connected between the second liquid heat exchanger 132 and the second energy storage heat exchanger 112.
The third cooling medium circuit exchanges heat with the second cooling medium circuit 102, and the second cooling medium circuit 102 needs to exchange heat with the charging system 300, and in this embodiment, the specific structure and operation of the second cooling medium circuit 102 may be similar to those of the first embodiment, and will not be repeated here.
In the present embodiment, specific circulation paths of different cooling medium circuits in different operation modes will be described in detail.
1. The energy storage system 200 is heated separately.
Referring to fig. 10, the third cooling medium circuit operates in the heat pump mode, the high-temperature and high-pressure refrigerant gas discharged from the second compressor 153 passes through the second reversing valve 154 and enters the second liquid heat exchanger 132, exchanges heat with the cooling medium in the first cooling medium circuit 101 in the second liquid heat exchanger 132, heats the cooling medium in the second cooling medium circuit 102 while the refrigerant is condensed into a liquid state by heat release, then enters the second air heat exchanger 142 through the fourth throttling valve 164 and the fifth communication valve 175, absorbs the heat of the external air in the second air heat exchanger 142 and evaporates into a gaseous state, and then returns to the second compressor 153 through the second reversing valve 154 and the liquid storage tank 156 to complete the cycle.
Meanwhile, in the first cooling medium loop 101, the second liquid pump 192 operates, the cooling medium is heated in the second liquid heat exchanger 132 and then enters the second energy storage heat exchanger 112 through the second liquid pump 192, the cooling medium is divided into a plurality of branches in the second energy storage heat exchanger 112 and then enters cooling liquid plates inside each battery pack of the energy storage system 200 to heat the battery, and then flows through the third air heat exchanger 143 after being converged inside the energy storage system 200, at this time, the third air heat exchanger 143 does not work, only plays a role of a circulation pipeline, and then the cooling medium returns to the second liquid heat exchanger 132 through the first control valve 181 to complete circulation.
2. The energy storage system 200 is heated by the operating heat of the charging system 300 while the charging system 300 is not separately cooled.
Referring to fig. 11, the energy storage system 200 is heated by using the waste heat of the charging system 300. At this time, the third cooling medium circuit operates in the heat pump mode, the high-temperature and high-pressure refrigerant gas discharged from the second compressor 153 is diverted by the second reversing valve 154 and enters the second liquid heat exchanger 132, heat exchange is performed between the refrigerant gas and the cooling medium in the first cooling medium circuit 101 in the second liquid heat exchanger 132, the cooling medium in the first cooling medium circuit 101 is heated while the refrigerant is cooled and condensed into a liquid state by heat release, then the cooling medium enters the second intermediate communication pipeline 122 through the fourth throttling valve 164, the sixth communication valve 176 is conducted, and then enters the first liquid heat exchanger 131, the heat of the high-temperature cooling medium in the second cooling medium circuit 102 is absorbed in the first liquid heat exchanger 131, and meanwhile, the refrigerant is evaporated into a gaseous state and then returns to the second compressor 153 through the eighth communication valve 178, the second air heat exchanger 142, the second reversing valve 154 and the liquid storage tank 156 in sequence, so as to complete the cycle.
In the first cooling medium circuit 101, the second liquid pump 192 operates to send the cooling medium heated in the second liquid heat exchanger 132 to the second energy storage heat exchanger 112 to heat the cells in each of the battery packs in the energy storage system 200.
In the second cooling medium circuit 102, the first liquid pump 191 operates to transfer the cooling medium heated by the charging system 300 from the first port and the second port of the second control valve 182 to the first liquid heat exchanger 131, and heat is transferred to the refrigerant of the third cooling medium circuit in the first liquid heat exchanger 131.
3. The energy storage system 200 is heated by the operating heat of the charging system 300 while the charging system 300 is cooled separately.
Referring to fig. 12, the third cooling medium circuit operates in the heat pump mode, and the refrigerant circulation path in the third cooling medium circuit and the cooling medium circulation path in the first cooling medium circuit 101 are the same as those in the second mode, and will not be described again here.
In the second cooling medium circuit 102, the first liquid pump 191 operates to transfer a part of the cooling liquid heated by the charging system 300 from the first port and the second port of the second control valve 182 to the first liquid heat exchanger 131 for supplying heat to the refrigerant of the third cooling medium circuit; another part is sent from the first and third ports of the second control valve 182 to the fourth air heat exchanger 144, heat is dissipated to the outside air in the fourth air heat exchanger 144, and then reaches the third control valve 183 through the fourth intermediate communication line 124, from the first and second ports of the third control valve 183 back to the first liquid pump 191. In this mode, when the heating power of the charging system 300 is larger and exceeds the heating power required by the energy storage system 200, part of the heat can be dissipated to the external environment.
4. The energy storage system 200 is cooled separately.
Referring to fig. 13, in the first cooling medium circuit 101, the second liquid pump 192 is operated, the cooling medium enters the second energy storage heat exchanger 112 from the second liquid pump 192 to cool the batteries inside each battery pack in the energy storage system 200, and then enters the third air heat exchanger 143 to dissipate heat to the external environment, at this time, if the temperature of the cooling medium detected by the temperature detecting unit in the system is not higher than the preset value, the first interface and the third interface of the first control valve 181 are communicated, and the cooling medium directly returns to the second liquid pump 192 through the third intermediate communication pipeline 123 to complete the cooling cycle; if the temperature of the cooling liquid detected by the temperature detecting unit in the system is higher than the preset value, the first interface and the second interface of the first control valve 181 are communicated, the cooling medium enters the second liquid heat exchanger 132 through the first control valve 181 and is further cooled by the refrigerant in the third cooling medium loop, and then returns to the second liquid pump 192, so that the cooling cycle is completed.
Meanwhile, the second compressor 153 in the second cooling medium circulation is started, the high-temperature and high-pressure refrigerant gas coming out of the second compressor 153 is regulated by the second reversing valve 154, is firstly subjected to heat exchange with the outside air in the second air heat exchanger 142 and condensed into a liquid state, then enters the second liquid heat exchanger 132 after passing through the fifth communication valve 175 and the fourth throttling valve 164, absorbs the heat of the high-temperature cooling medium in the first cooling medium circuit 101 in the second liquid heat exchanger 132, is vaporized into gas while cooling the cooling medium in the first cooling medium circuit 101, and finally returns to the second compressor 153 through the second reversing valve 154 and the liquid storage tank 156 to complete the circulation.
5. The charging system 300 is cooled separately.
Referring to fig. 14, in the second cooling medium circuit 102, the first liquid pump 191 is operated, the cooling medium enters the charging system 300 from the first liquid pump 191 to absorb heat generated during operation, then enters the fourth air heat exchanger 144 through the first interface and the third interface of the second control valve 182 to dissipate heat and cool, at this time, if the temperature of the cooling medium detected by the temperature detecting unit in the system is not higher than a preset value, the first interface and the second interface of the third control valve 183 are communicated, and the cooling medium cooling liquid returns from the third control valve 183 to the first liquid pump 191 directly after passing through the fourth intermediate communication pipeline 124 to complete cooling circulation; if the temperature of the cooling medium detected by the temperature detecting unit in the system is higher than the preset value, the first interface of the third control valve 183 is communicated with the third interface, the cooling medium enters the first liquid heat exchanger through the third control valve 183 and is further cooled by the refrigerant in the third cooling medium loop, and then flows back to the first liquid pump 191 to complete the cooling cycle.
If the temperature of the cooling medium detected by the temperature detecting unit in the system is higher than the preset value, the second compressor 153 in the third cooling medium loop is started, the high-temperature and high-pressure refrigerant gas coming out of the second compressor 153 is regulated by the second reversing valve 154, firstly passes through the second air heat exchanger 142, exchanges heat with the outside air in the second air heat exchanger 142 and is condensed into a liquid state, then passes through the third throttling valve 163 and enters the first liquid heat exchanger 131, absorbs the heat of the high-temperature cooling medium in the second cooling medium loop 102 in the first liquid heat exchanger 131, evaporates into gas while cooling the cooling medium, and finally returns to the second compressor 153 through the second reversing valve 154 and the liquid storage tank 156 to complete the circulation.
6. The energy storage system 200 and the charging system 300 are simultaneously cooled.
Referring to fig. 15, the heat exchange assembly 100 is only required to enter the fifth and sixth modes at the same time, and will not be described herein.
Referring to fig. 16, in a third possible embodiment, the difference between the foregoing two embodiments is that the heat exchange process between the first cooling medium circuit 101 and the second cooling medium circuit 102 is not required to be indirectly performed through other cooling medium circuits or liquid heat exchangers, but the first cooling medium circuit 101 and the second cooling medium circuit 102 may be selectively directly communicated, so that the working heat of the charging system 300 is used to heat the energy storage system 200 in a relatively direct heat exchange manner.
The heat exchange assembly 100 may further include a third valve assembly disposed in the cooling medium circuit, where the third valve assembly is configured to control the first cooling medium circuit 101 and the second cooling medium circuit 102 to be disconnected or connected to each other, and when the first cooling medium circuit 101 and the second cooling medium circuit 102 are connected to each other, the cooling medium in the second cooling medium circuit 102 directly flows through the first cooling medium circuit 101 and exchanges heat with the energy storage system 200.
It can be appreciated that by providing the third valve assembly, the first cooling medium circuit 101 and the second cooling medium circuit 102 may be relatively independent, or may form an integral cooling medium circulation circuit, and in the thermal management process, independent temperature control of the energy storage system 200 and the charging system 300 may be achieved, or heat exchange may be formed between the two according to the ambient temperature or the heating state, so as to reduce energy consumption and improve energy utilization.
Since the first cooling medium circuit 101 and the second cooling medium circuit 102 need to be in thermal communication with the external environment in addition to the thermal communication between the first cooling medium circuit 101 and the second cooling medium under the operating environments of different temperatures, the energy storage system 200 can be heated by the operating heat of the charging system 300, and the energy storage system 200 can be independently heated or cooled, and the charging system 300 can be independently cooled.
Therefore, to fulfill the requirements of different operation modes, the cooling medium circuit in the heat exchange assembly 100 may further include a fourth cooling medium circuit, and a third liquid heat exchanger 133 and a fourth liquid heat exchanger 134 may be disposed in the heat exchange assembly 100, wherein a first liquid heat exchange channel of the third liquid heat exchanger 133 is connected to the first cooling medium circuit 101, a first liquid heat exchange channel of the fourth liquid heat exchanger 134 is connected to the second cooling medium circuit 102, a second liquid heat exchange channel of the third liquid heat exchanger 133 and a second liquid heat exchange channel of the fourth liquid heat exchanger 134 are connected in parallel to the fourth cooling medium circuit, the third liquid heat exchanger 133 is used for exchanging heat of the fourth cooling medium circuit with the first cooling medium circuit 101, and the fourth liquid heat exchanger 134 is used for exchanging heat of the fourth cooling medium circuit with the second cooling medium circuit 102.
It will be appreciated that by providing a fourth cooling medium circuit, independent thermal management and temperature control of the first and second refrigerant circuits may be achieved, thereby accommodating the needs of different operating modes at different ambient temperatures, to ensure that the energy storage system 200 and the charging system 300 may be positioned at appropriate operating temperatures.
First, the structure of the first coolant circuit 101 in the present embodiment will be described below.
With continued reference to fig. 16, the first cooling medium circuit 101 may include a third energy storage heat exchanger 113 and a fifth air heat exchanger 145, where the third energy storage heat exchanger 113 is configured to exchange heat with the energy storage system 200, the third energy storage heat exchanger 113, the fifth air heat exchanger 145 and the first liquid heat exchange channel of the third liquid heat exchanger 133 are sequentially connected, the third valve assembly includes a fourth control valve 184, the fourth control valve 184 is connected between the fifth air heat exchanger 145 and the first liquid heat exchange channel of the third liquid heat exchanger 133, and a first interface of the fourth control valve 184 is connected with the fifth air heat exchanger 145, and a second interface and a third interface of the fourth control valve 184 are respectively connected to opposite ends of the first liquid heat exchange channel in the third liquid heat exchanger 133.
Based on the two branches formed between the fifth air heat exchanger 145 and the third energy storage heat exchanger 113 by the fourth control valve 184, the first cooling medium circuit 101 may have two heat dissipation modes of air-liquid heat exchange and liquid-liquid heat exchange, and the fourth control valve 184 may be used to select a cooling medium circulation circuit that is not used, so that different heat dissipation modes or combinations of heat dissipation modes are selected in different temperature states, thereby reducing energy consumption while ensuring sufficient heat dissipation efficiency.
In order to realize the function that the first cooling medium circuit 101 can independently heat the energy storage system 200, the heat exchange assembly 100 may further include an electric heating unit 114, where the electric heating unit 114 is disposed in the first cooling medium circuit 101 and is used for heating the cooling medium in the first cooling medium circuit 101, so as to convert electric energy into heat energy, and when the heat provided by the charging system 300 during operation is insufficient to maintain the operating temperature of the energy storage system 200, the temperature of the cooling medium may be further increased by an electric heating manner, so as to maintain the operating temperature of the energy storage system 200 within a suitable range.
It should be noted that, the electric heating unit 114 may be connected to any position in the first cooling medium circuit 101, only the circulating cooling medium needs to be heated, for example, the electric heating unit 114 may be connected between the fifth air heat exchanger 145 and the third energy storage heat exchanger 113, and in the first cooling medium circuit 101 and the second cooling medium circuit 102, the cooling medium in the second cooling medium circuit 102 may enter from the inlet side of the electric heating unit 114, so that it may be determined whether the temperature of the cooling medium heated by the charging system 300 is sufficient to perform the heating function on the energy storage system 200, and then flows into the electric heating unit 114, and the cooling medium flowing out of the electric heating unit 114 may flow through the third energy storage heat exchanger 113 to perform the heat exchange with the energy storage system 200. By way of example, the electric heating unit 114 may be a water ceramic heater. When the electric heating unit 114 is not in operation, it only functions as a flow-through line.
The communication method between the first coolant circuit 101 and the second coolant circuit 102 and the structure of the second coolant circuit 102 in the present embodiment will be described below.
With continued reference to fig. 16, the third valve assembly may further include a fifth control valve 185 and a sixth control valve 186, wherein the first port and the second port of the fifth control valve 185 are connected to the second cooling medium circuit 102, the third port of the fifth control valve 185 is in communication with the first cooling medium circuit 101, the first port and the second port of the sixth control valve 186 are connected to the first cooling medium circuit 101, and the third port of the sixth control valve 186 is in communication with the second cooling medium circuit 102.
By providing the fifth control valve 185 and the sixth control valve 186, an accurate and efficient switching between the on and off states of the first cooling medium circuit 101 and the second cooling medium circuit 102 can be achieved, so as to achieve different operation modes at different ambient temperatures.
In addition, the second cooling medium circuit 102 may further include a sixth air heat exchanger 146, the third valve assembly further includes a seventh control valve 187, the first port of the seventh control valve 187 and the first port of the sixth control valve 186 are connected to opposite ends of the sixth air heat exchanger 146, the third port of the seventh control valve 187 and the third port of the sixth control valve 186 are connected to opposite ends of the first liquid heat exchanging channel of the fourth liquid heat exchanger 134, and the second port of the seventh control valve 187 and the second port of the sixth control valve 186 are connected to opposite ends of the charging member heat exchanger 110.
It will be appreciated that when the operating temperature of the charging system 300 is high and heat dissipation is required, the second cooling medium circuit 102 may have two heat dissipation modes, i.e. air-liquid heat exchange and liquid-liquid heat exchange, and the sixth control valve 186 and the seventh control valve 187 may be used to select a cooling medium circulation circuit that is not used, so that different heat dissipation modes or combinations of heat dissipation modes are selected in different temperature states, thereby reducing energy consumption while ensuring sufficient heat dissipation efficiency.
A third liquid pump 193 may be provided in the first coolant circuit 101 to drive the flow of the coolant in the first coolant circuit 101, a fourth liquid pump 194 may be provided in the second coolant circuit 102 to drive the flow of the coolant in the second coolant circuit 102, and the fourth liquid pump 194 may be used as a power source for driving when the first coolant circuit 101 and the second coolant circuit 102 are communicated to form an integral cycle.
The specific configuration of the fourth cooling medium circuit in the present embodiment will be described below.
With continued reference to fig. 16, the fourth cooling medium circuit may include a third compressor 155, a seventh air heat exchanger 147, a fifth throttle valve 165 and a sixth throttle valve 166, where an outlet of the third compressor 155 is sequentially connected to an inlet of the seventh air heat exchanger 147, the third liquid heat exchanger 133 and the fourth liquid heat exchanger 134 are connected in parallel between the inlet of the third compressor 155 and an outlet of the seventh air heat exchanger 147, the fifth throttle valve 165 is connected between the third liquid heat exchanger 133 and an outlet of the seventh air heat exchanger 147, and the sixth throttle valve 166 is connected between the fourth liquid heat exchanger 134 and an outlet of the seventh air heat exchanger 147.
It will be appreciated that the seventh air heat exchanger 147 may act as a condenser, such that the third liquid heat exchanger 133 and the fourth liquid heat exchanger 134 form parallel branches in the fourth cooling medium circuit, and that both the third liquid heat exchanger 133 and the fourth liquid heat exchanger 134 may act as evaporators, so that the corresponding first cooling medium circuit 101 and second cooling medium circuit 102 may be thermally managed respectively.
In the present embodiment, specific circulation paths of different cooling medium circuits in different operation modes will be described in detail.
1. The energy storage system 200 is heated separately.
Referring to fig. 17, in the first cooling medium circuit 101, the third liquid pump 193 is operated, the cooling medium enters the electric heating unit 114 through the third liquid pump 193, is heated in the electric heating unit 114 and then enters the third energy storage heat exchanger 113, the batteries inside each battery pack in the energy storage system 200 are heated in the third energy storage heat exchanger 113, at this time, the first interface and the second interface of the fifth control valve 185 are communicated, the first interface and the third interface of the fourth control valve 184 are communicated, and the cooling liquid sequentially passes through the fifth control valve 185, the fifth air heat exchanger 145 and the fourth control valve 184 and then returns to the third liquid pump 193. The fifth air heat exchanger 145 is not operated at this time, and heat of the cooling medium is prevented from being emitted to the environment.
2. The energy storage system 200 is heated by the operating heat of the charging system 300 while the charging system 300 is not separately cooled.
Referring to fig. 18, at this time, the second cooling medium circuit 102 is connected to the first cooling medium circuit 101, the fourth liquid pump 194 is operated, the cooling medium enters the charging member heat exchanger 110 through the fourth liquid pump 194, absorbs the heat of the charging system 300, and then enters the electric heating unit 114 through the first interface and the third interface of the sixth control valve 186, the cooling medium temperature collecting device is disposed in the electric heating unit 114, if the cooling medium entering the electric heating unit 114 does not reach the set temperature threshold, the electric heating unit 114 is started to perform the additional heating, and if the cooling medium reaches the set temperature threshold, the electric heating unit 114 does not operate. The cooling medium flows out from the electric heating unit 114 and enters the third energy storage heat exchanger 113, the batteries of each battery pack of the energy storage system 200 are heated in the third energy storage heat exchanger 113, and finally the cooling medium flows back to the fourth liquid pump 194 after passing through the first interface and the third interface of the fifth control valve 185, so that circulation is completed.
3. The energy storage system 200 is heated by the operating heat of the charging system 300 while the charging system 300 is cooled separately.
Referring to fig. 19, at this time, the second cooling medium circuit 102 is in communication with the first cooling medium circuit 101, the fourth liquid pump 194 is operated, and the cooling medium enters the charging member heat exchanger 110 through the fourth liquid pump 194, and the temperature rises after absorbing the heat of the charging system 300. The first interface, the second interface and the third interface of the sixth control valve 186 are all opened, a part of cooling medium flows out through the first interface and the third interface of the sixth control valve 186, enters the third energy storage heat exchanger 113 after passing through the electric heating unit 114, heats the batteries of each battery pack of the energy storage system 200 in the third energy storage heat exchanger 113, flows out through the third interface of the fifth control valve 185, and flows back to the fourth liquid pump 194; the other part of the cooling medium flows out through the first interface and the second interface of the sixth control valve 186, flows out through the first interface and the second interface of the seventh control valve 187 after being cooled by the sixth air heat exchanger 146, and flows back to the fourth liquid pump 194 after being converged with the cooling medium flowing out of the third interface of the fifth control valve 185.
4. The energy storage system 200 is cooled separately.
Referring to fig. 20, in the first cooling medium circuit 101, the third liquid pump 193 is started, the cooling medium enters the electric heating unit 114 from the third liquid pump 193, at this time, the electric heating unit 114 is not operated, then enters the third energy storage heat exchanger 113 to absorb the working heat of the battery pack in the energy storage system 200, then the high temperature cooling medium flows out of the third energy storage heat exchanger 113, passes through the first interface and the second interface of the fifth control valve 185, enters the fifth air heat exchanger 145, and exchanges heat with the external air in the fifth air heat exchanger 145. A cooling medium temperature detection unit is installed in the system, and can be placed at the positions of the outlet of the fifth air heat exchanger 145, the inlet of the third energy storage heat exchanger 113 and the like, and if the temperature of the cooling medium subjected to heat radiation by the fifth air heat exchanger 145 is detected not to be higher than a preset temperature threshold value, the first interface and the third interface of the fourth control valve 184 are communicated, and the cooling medium directly flows back to the third liquid pump 193 through the fourth control valve 184; if the temperature of the cooling medium cooled by the fifth air heat exchanger 145 is detected to be higher than the preset temperature threshold, the first interface and the second interface of the fourth control valve 184 are communicated, the cooling liquid enters the third liquid heat exchanger 133 via the fourth control valve 184, exchanges heat with the refrigerant in the fourth cooling medium loop, and then is cooled down again and returns to the third liquid pump 193.
If it is detected that the temperature of the cooling medium cooled by the fifth air heat exchanger 145 is higher than the preset temperature threshold, in the fourth cooling medium circuit, the third compressor 155 is started at the same time, the high-temperature and high-pressure refrigerant gas flowing out of the third compressor 155 enters the seventh air heat exchanger 147 to be condensed into high-temperature and high-pressure refrigerant liquid, and then is throttled by the fifth throttle valve 165 to become a low-temperature and low-pressure gas-liquid mixture, and enters the third liquid heat exchanger 133, and heat exchange is performed between the third liquid heat exchanger 133 and the cooling medium in the first cooling medium circuit 101, and the heat in the cooling medium is absorbed and then returned to the third compressor 155.
5. The charging system 300 is cooled separately.
Referring to fig. 21, in the second cooling medium circuit 102, the fourth liquid pump 194 is started, the cooling medium enters the charging member heat exchanger 110 from the fourth liquid pump 194 to take away the heat generated by the operation of the charging system 300, and then enters the sixth air heat exchanger 146 through the first interface of the sixth control valve 186 and the second interface, and exchanges heat with the external air in the sixth air heat exchanger 146 to dissipate the heat to the surrounding environment. A temperature detection unit can be installed in the second cooling medium loop 102, and the installation position can be selected from the outlet of the sixth air heat exchanger 146, the inlet of the charging member heat exchanger 110 and the like, if the temperature of the cooling medium is detected to be less than or equal to a set value, the first interface and the third interface of the seventh control valve 187 are communicated, and the cooling medium directly returns to the fourth liquid pump 194 to complete the cooling cycle; if the temperature of the cooling medium is higher than the set value, the first port and the second port of the seventh control valve 187 are connected, and the cooling medium enters the fourth liquid heat exchanger 134, exchanges heat with the refrigerant in the fourth cooling medium circuit, and then is cooled down again and returned to the fourth liquid pump 194.
If the temperature of the cooling medium is higher than the set value, the third compressor 155 is started at the same time in the fourth cooling medium circuit, the high-temperature and high-pressure refrigerant gas flowing out of the third compressor 155 enters the seventh air heat exchanger 147 to be condensed into high-temperature and high-pressure refrigerant liquid, and then the high-temperature and high-pressure refrigerant liquid is throttled by the sixth throttle valve 166 to become a low-temperature and low-pressure gas-liquid mixture to enter the fourth liquid heat exchanger 134, and heat exchange is performed between the high-temperature and low-pressure gas-liquid mixture and the cooling medium in the second cooling medium circuit 102 in the fourth liquid heat exchanger 134, and the high-temperature and high-pressure gas-liquid mixture returns to the third compressor 155 after absorbing heat in the cooling medium.
6. The energy storage system 200 and the charging system 300 are simultaneously cooled.
Referring to fig. 22, the heat exchange assembly 100 is only required to enter the fifth and sixth modes at the same time, and will not be described herein.
It should be noted that, in different embodiments of the present application, the connection positions of the components in the cooling medium circuit of the heat exchange assembly 100 represent only one exemplary arrangement scheme, and the positions and the connection sequences of the components in the cooling medium circuit are adjusted in the technical scheme of the present application while the implemented functions and the achieved effects are not changed, which should be regarded as the technical scheme equivalent to the embodiment of the present application.
According to the energy storage charging station provided by the embodiment of the application, the heat of the energy storage system and the charging system is managed in a concentrated manner, so that the heat exchange assembly can be utilized to exchange heat between the energy storage system and the charging system, the cooling medium in the cooling medium loop flows through the charging system and the energy storage system respectively, the heat exchange is realized between the charging system and the cooling medium loop, and the heat generated by the charging system during operation is transmitted to the energy storage system through the cooling medium loop for use, thereby reducing the energy consumption required by maintaining the temperature by energy storage heating and improving the energy utilization efficiency.
In describing embodiments of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "coupled" should be construed broadly, and may be, for example, fixedly coupled, indirectly coupled through an intermediary, in communication between two elements, or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.
The terms "first," "second," "third," "fourth," and the like in the description of embodiments of the present application, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the embodiments of the present application, and are not limited thereto; although embodiments of the present application have been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (19)

1. An energy storage charging station is characterized by comprising a heat exchange assembly, an energy storage system for storing electric energy and a charging system for charging an electric device, wherein the energy storage system is electrically connected with the charging system;
The heat exchange assembly comprises a cooling medium loop, wherein cooling medium in the cooling medium loop flows through the charging system and the energy storage system respectively, and heat exchange is carried out between the charging system and the energy storage system and the cooling medium loop so as to transfer heat generated when the charging system works to the energy storage system through the cooling medium loop;
The heat exchange assembly includes at least two cooling medium circuits including a first cooling medium circuit configured to exchange heat with the energy storage system and a second cooling medium circuit configured to cool the charging system;
The first cooling medium loop and the second cooling medium loop can be communicated or can have heat exchange, so that the cooling medium in the second cooling medium loop exchanges heat with the energy storage system;
The heat exchange assembly further comprises at least one liquid heat exchanger, wherein the liquid heat exchanger is used for carrying out heat exchange between different cooling medium loops, the liquid heat exchanger is provided with a first liquid heat exchange channel and a second liquid heat exchange channel, and heat exchange is carried out between the first liquid heat exchange channel and the second liquid heat exchange channel of the same liquid heat exchanger;
The at least one liquid heat exchanger comprises a first liquid heat exchanger, the second cooling medium loop is connected to a first liquid heat exchange channel in the first liquid heat exchanger, and the second liquid heat exchange channel of the first liquid heat exchanger is communicated with or has heat exchange with the first cooling medium loop;
the at least two cooling medium circuits further comprise a third cooling medium circuit;
The liquid heat exchanger further comprises a second liquid heat exchanger, a first liquid heat exchange channel of the second liquid heat exchanger is connected with the first cooling medium loop, the second liquid heat exchange channel of the second liquid heat exchanger is connected with the third cooling medium loop in an on-off mode, and the second liquid heat exchange channel of the first liquid heat exchanger is connected with the third cooling medium loop in an on-off mode;
When the second liquid heat exchange channel of the second liquid heat exchanger and the second liquid heat exchange channel of the first liquid heat exchanger are in a communication state, the third cooling medium loop exchanges heat between the first cooling medium loop and the second cooling medium loop.
2. The energy storage charging station of claim 1, wherein the heat exchange assembly further comprises a charger heat exchanger in communication with the second cooling medium circuit and configured to exchange heat with the charging system.
3. The energy storage charging station of claim 2, wherein the heat exchange assembly further comprises a first energy storage heat exchanger in communication with the first cooling medium circuit and configured to exchange heat with the energy storage system through a phase change of the cooling medium.
4. The energy storage charging station of claim 3, further comprising a first heat pump assembly, a first air heat exchanger, and a first throttle valve in the first cooling medium circuit;
The first end of the first liquid heat exchanger is connected with the first air heat exchanger, and the second end of the first liquid heat exchanger is connected between the first heat pump assembly and the first energy storage heat exchanger;
the heat exchange assembly further includes a first valve assembly configured to control a communication state of the first liquid heat exchanger in the first cooling medium circuit;
The first heat pump assembly comprises a first compressor and a first reversing valve, the first compressor and the first reversing valve are both connected in the first cooling medium loop, the first compressor is used for driving cooling medium in the first cooling medium loop to flow, and the first reversing valve is used for changing the flow direction of the cooling medium in the first cooling medium loop.
5. The energy storage charging station of claim 4, wherein the first valve assembly comprises a first communication valve and a second communication valve, the first cooling medium circuit further comprises a first intermediate communication line, the first communication valve is connected between the first air heat exchanger and the first throttle valve, a first end of the first liquid heat exchanger is connected between the first communication valve and the first air heat exchanger, a second end of the first liquid heat exchanger is connected between the first communication valve and the first throttle valve through the first intermediate communication line, and the second communication valve is connected to the first intermediate communication line.
6. The energy storage charging station of claim 5, wherein the first valve assembly further comprises a third communication valve and a fourth communication valve, the second end of the first liquid heat exchanger being connected between the first heat pump assembly and the first energy storage heat exchanger through the third communication valve; the first cooling medium loop also comprises a second throttle valve, and the fourth communication valve and the second throttle valve are connected between the first air heat exchanger and the first end of the first liquid heat exchanger in parallel.
7. The energy storage charging station of claim 2, wherein the third cooling medium circuit includes a second heat pump assembly, a second air heat exchanger, a third throttle valve, and a fourth throttle valve therein;
The third throttle valve is connected between the first end of the first liquid heat exchanger and the second air heat exchanger, the second end of the first liquid heat exchanger is connected with the second heat pump assembly, the fourth throttle valve is connected between the first end of the second liquid heat exchanger and the second air heat exchanger, and the second end of the second liquid heat exchanger is connected with the second heat pump assembly;
the second heat pump assembly comprises a second compressor and a second reversing valve, the second compressor and the second reversing valve are both connected in the third cooling medium loop, the second compressor is used for driving cooling medium in the third cooling medium loop to flow, and the second reversing valve is used for changing the flow direction of the cooling medium in the third cooling medium loop.
8. The energy storage charging station of claim 7, wherein the heat exchange assembly further comprises a second valve assembly configured to control the communication state of the first and second liquid heat exchangers with the third cooling medium circuit, respectively;
The second valve assembly includes a fifth communication valve and a sixth communication valve; the third cooling medium loop further comprises a second intermediate communication pipeline, the fifth communication valve is connected between the fourth throttle valve and the second air heat exchanger, the first end of the first liquid heat exchanger is connected with the third throttle valve, the second end of the first liquid heat exchanger is connected between the fifth communication valve and the fourth throttle valve through the second intermediate communication pipeline, and the sixth communication valve is connected to the second intermediate communication pipeline.
9. The energy storage charging station of claim 8, wherein the second valve assembly further comprises a seventh communication valve and an eighth communication valve, the seventh communication valve being connected between the second end of the first liquid heat exchanger and the second heat pump assembly, the eighth communication valve having two ends respectively connected in parallel with the two ends of the third throttle valve.
10. The energy storage charging station of any of claims 1-9, wherein the first cooling medium circuit comprises a second energy storage heat exchanger and a third air heat exchanger, wherein the second energy storage heat exchanger, the third air heat exchanger, and the first liquid heat exchange channel of the second liquid heat exchanger are connected in sequence, and wherein the second energy storage heat exchanger is configured to exchange heat with the energy storage system;
The first cooling medium loop further comprises a first control valve, the first control valve is connected between the third air heat exchanger and the second liquid heat exchanger, a first interface and a second interface of the first control valve are respectively connected with the third air heat exchanger and the first end of the second liquid heat exchanger, and a third interface of the first control valve is connected between the second end of the second liquid heat exchanger and the second energy storage heat exchanger.
11. The energy storage charging station of any of claims 2-9, further comprising a fourth air heat exchanger and a second control valve in the second cooling medium circuit, the second control valve connected between the charging member heat exchanger and the first liquid heat exchanger, and a first interface and a second interface of the second control valve connected with one end of the charging member heat exchanger and one end of the first liquid heat exchanger, respectively;
the first end of the fourth air heat exchanger is connected with the third interface of the second control valve, and the second end of the fourth air heat exchanger is connected with the other end of the first liquid heat exchanger.
12. The energy storage charging station of claim 11, further comprising a third control valve in the second cooling medium circuit, the first and second interfaces of the third control valve being connected to the fourth air heat exchanger and the charging member heat exchanger, respectively, the third interface of the third control valve being connected between the second control valve and the first liquid heat exchanger.
13. An energy storage charging station is characterized by comprising a heat exchange assembly, an energy storage system for storing electric energy and a charging system for charging an electric device, wherein the energy storage system is electrically connected with the charging system;
The heat exchange assembly comprises a cooling medium loop, wherein cooling medium in the cooling medium loop flows through the charging system and the energy storage system respectively, and heat exchange is carried out between the charging system and the energy storage system and the cooling medium loop so as to transfer heat generated when the charging system works to the energy storage system through the cooling medium loop;
The heat exchange assembly includes at least two cooling medium circuits including a first cooling medium circuit configured to exchange heat with the energy storage system and a second cooling medium circuit configured to cool the charging system;
The first cooling medium loop and the second cooling medium loop can be communicated or can have heat exchange, so that the cooling medium in the second cooling medium loop exchanges heat with the energy storage system;
the heat exchange assembly further comprises at least one liquid heat exchanger, wherein the liquid heat exchanger is used for carrying out heat exchange between different cooling medium loops, the liquid heat exchanger is provided with a first liquid heat exchange channel and a second liquid heat exchange channel, and heat exchange is carried out between the first liquid heat exchange channel and the second liquid heat exchange channel of the same liquid heat exchanger; the heat exchange assembly further includes a third valve assembly disposed in the cooling medium circuit, the third valve assembly configured to control the first cooling medium circuit and the second cooling medium circuit to be disconnected from or in communication with each other;
When the first cooling medium loop and the second cooling medium loop are communicated with each other, the cooling medium in the second cooling medium loop flows through the first cooling medium loop so as to exchange heat with the energy storage system;
the heat exchange assembly further comprises at least one liquid heat exchanger, the at least two cooling medium loops further comprise a fourth cooling medium loop, the at least one liquid heat exchanger comprises a third liquid heat exchanger and a fourth liquid heat exchanger, a first liquid heat exchange channel of the third liquid heat exchanger is connected in the first cooling medium loop, a first liquid heat exchange channel of the fourth liquid heat exchanger is connected in the second cooling medium loop, and a second liquid heat exchange channel of the third liquid heat exchanger and a second liquid heat exchange channel of the fourth liquid heat exchanger are connected in parallel in the fourth cooling medium loop;
the third liquid heat exchanger is used for enabling the fourth cooling medium loop to conduct heat exchange with the first cooling medium loop, and the fourth liquid heat exchanger is used for enabling the fourth cooling medium loop to conduct heat exchange with the second cooling medium loop.
14. The energy storage charging station of claim 13, wherein the heat exchange assembly further comprises a charger heat exchanger in communication with the second cooling medium circuit and configured to exchange heat with the charging system.
15. The energy storage charging station of claim 14, wherein the first cooling medium circuit comprises a third energy storage heat exchanger and a fifth air heat exchanger, the third energy storage heat exchanger configured to exchange heat with the energy storage system, the third energy storage heat exchanger, the fifth air heat exchanger, and the first liquid heat exchange channel of the third liquid heat exchanger being connected in sequence;
The third valve assembly comprises a fourth control valve, the fourth control valve is connected between the fifth air heat exchanger and the first liquid heat exchange channel of the third liquid heat exchanger, a first interface of the fourth control valve is connected with the fifth air heat exchanger, and a second interface and a third interface of the fourth control valve are respectively connected to two opposite ends of the first liquid heat exchange channel in the third liquid heat exchanger.
16. The energy storage charging station of claim 15, wherein the heat exchange assembly further comprises an electrical heating unit disposed in the first cooling medium loop for heating the cooling medium in the first cooling medium loop, the electrical heating unit being connected between the fifth air heat exchanger and the third energy storage heat exchanger.
17. The energy storage charging station of claim 16, wherein the energy storage charging station comprises,
The third valve assembly further comprises a fifth control valve and a sixth control valve, a first interface and a second interface of the fifth control valve are connected in the second cooling medium loop, and a third interface of the fifth control valve is communicated with the first cooling medium loop;
The first interface and the second interface of the sixth control valve are connected in the first cooling medium loop, and the third interface of the sixth control valve is communicated with the second cooling medium loop.
18. The energy storage charging station of claim 17, further comprising a sixth air heat exchanger in the second cooling medium circuit;
The third valve assembly further comprises a seventh control valve, a first interface of the seventh control valve and a first interface of the sixth control valve are respectively connected to two opposite ends of the sixth air heat exchanger, a third interface of the seventh control valve and a third interface of the sixth control valve are respectively connected to two ends of the first liquid heat exchange channel of the fourth liquid heat exchanger, and a second interface of the seventh control valve and a second interface of the sixth control valve are respectively connected to two opposite ends of the charging member heat exchanger.
19. The energy storage charging station of any of claims 13-18, wherein the fourth cooling medium circuit includes a third compressor, a seventh air heat exchanger, a fifth throttle valve, and a sixth throttle valve therein;
The outlet of the third compressor is connected with the inlet of the seventh air heat exchanger, the third liquid heat exchanger and the fourth liquid heat exchanger are connected in parallel between the inlet of the third compressor and the outlet of the seventh air heat exchanger, the fifth throttle valve is connected between the third liquid heat exchanger and the outlet of the seventh air heat exchanger, and the sixth throttle valve is connected between the fourth liquid heat exchanger and the outlet of the seventh air heat exchanger.
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